Just over a month after hitting an all-time high in June, the KOSPI has fallen nearly 40% from its peak
July 2026 has earned a new and unwelcome distinction in Korean stock market history. This month’s KOSPI decline has surpassed both the 1997 IMF foreign exchange crisis and the 2008 global financial crisis, marking the steepest monthly decline since 1990. Today (the 30th), after two days of steep losses, the index attempted to reclaim the 6,000 level intraday but ultimately failed, closing down another 1.23% at 5,593.56. Here’s a full recap of what happened this month.
The Numbers Behind the ‘Worst Month Ever’
According to the Korea Exchange, the KOSPI has fallen roughly 34% this month as of the 30th, down from 8,476.48 at the end of June. That surpasses the monthly decline during the IMF foreign exchange crisis in October 1997 (-27.25%), and even the global financial crisis in October 2008 (-23.13%), making it the steepest monthly decline since 1990. Widening the lens to US markets, it even exceeds the Nasdaq’s decline during the dot-com bubble collapse in November 2000 (-22.9%).
Compared to the all-time intraday high of 9,385.59 set on June 19, the KOSPI has fallen nearly 40% in just over a month. Over this stretch, total KOSPI market capitalization fell from 7,449.5927 trillion won to 4,993.2966 trillion won, wiping out 2,456.2961 trillion won (32.97%). Three of the KOSPI’s 15 largest single-day declines on record occurred this month alone (July 2: -7.89%, July 13: -8.95%, July 28: -10.84%), and both the KOSPI and KOSDAQ triggering circuit breakers on two consecutive days was the first such event in stock market history. Sidecars were triggered 42 times on the KOSPI and 26 times on the KOSDAQ so far this year.
A Rollercoaster Between Extremes: The Second-Biggest Monthly Surge Just Three Months Ago
Here’s the irony: just three months ago, in April, the KOSPI surged 30.61%, the second-highest monthly gain on record after January 1998 (+50.77%). The stocks driving that rally were none other than Samsung Electronics and SK hynix. From June of last year through June of this year, as the KOSPI climbed from 4,309.63 to 8,476.48, nearly doubling, these two stocks (along with related entities Samsung Electronics preferred and SK Square) accounted for 85% of the KOSPI’s total market cap gain. Now, the very stocks that drove the rally are leading the decline. Samsung Electronics closed today at 207,000 won (-0.72%), roughly 45% below its all-time high of 374,500 won set on June 19. SK hynix closed at 1.322 million won (-5.64%), down about 56% from its all-time high of 2.987 million won set on June 25.
Why It Collapsed This Badly: A Combination of Factors
This crash is being attributed not to a single piece of bad news, but to several factors converging at once.
- Fears over Chinese chip competition: The blockbuster Shanghai listing of China’s ChangXin Memory Technologies (CXMT) fueled fears that the memory chip market’s oligopoly structure could be disrupted.
- The AI chip “peak-out” debate: A prime example: Alphabet posted strong Q2 earnings on the 22nd, yet its stock fell roughly 7% anyway. This was read as a signal that the market has begun questioning the growth trajectory of the AI industry itself.
- Structural concentration risk: With Samsung Electronics and SK hynix (and related entities) accounting for as much as 61% of KOSPI market cap at the peak of the rally (up from 39%), the decline in these two stocks shook the entire index disproportionately.
- Volatility amplified by single-stock leveraged ETFs: Many observers point to capital concentrating into single-stock leveraged products tied to Samsung Electronics and SK hynix as a factor that further amplified volatility. Even in the National Assembly’s Political Affairs Committee, lawmakers criticized these products as having been rushed to market carelessly, exacerbating market volatility.
- Contagion from credit markets: According to Bloomberg, the credit default swap (CDS) premium on Nvidia’s 5-year corporate bonds, which had hovered between 0.35% and 0.50% from last December through May, spiked to 0.82%. The “AI circular financing” controversy is seen as having stoked anxiety in credit markets, which then spilled over into equities.
- Disappointment from SK hynix’s earnings call: Despite record earnings, the lack of any concrete mention of shareholder return policy is seen as having triggered disappointed selling.
Today (the 30th) Was Extremely Volatile Too
Today’s session felt like a microcosm of the entire month. The KOSPI opened up 18.53 points (0.33%) at 5,681.77, climbed as high as 5,976.82 (+5.54%) intraday, coming within reach of reclaiming 6,000, but selling pressure intensified again in the afternoon, and the index ultimately closed down 69.68 points (1.23%) at 5,593.56. Over the three sessions since the 27th (6,755.75), the index has lost 1,162.19 points (17%). Samsung Electronics rose as much as 8.39% intraday on a dividend announcement (374 won per share for Q2) and bargain-hunting, before closing slightly lower. SK hynix also staged a rebound before easing back under selling pressure, closing down 5.64%. LG Energy Solution (+6.49%), Samsung Biologics (+3.25%), and KB Financial (+4.56%) closed higher, however, hinting at capital rotating out of semiconductors. The won closed at 1,437.10 per dollar, and the government held an emergency market review meeting today.
Investor Takeaways and Expert Views
⚠️ Things Investors Should Watch
- Even “undervalued” calls are divided: Some research houses view current valuations as an “extreme undervaluation” zone, while others say the index has already broken below fair support levels and are declining to comment altogether. Before jumping into bargain-hunting, it’s worth recognizing this divergence in views.
- Failed rebounds keep repeating: Today marked another instance of the index coming within reach of reclaiming 6,000, only to fall back. Given how often this “false hope” pattern has repeated, rushing in on short-term rebound signals alone can be risky.
- Recovering the previous peak could take considerable time: Past instances of comparably large declines have historically taken a long time to fully recover, worth keeping in mind here as well.
- Watch for rotation outside of semiconductors: As seen today in the strength of secondary battery, biotech, and financial stocks, whether capital continues rotating out of chips into other sectors will be the key thing to watch in the next phase.
- Further regulation of leveraged products is possible: With even the National Assembly pointing out design flaws in single-stock leveraged products, it’s worth keeping in mind that additional regulation could be on the way.
📌 What Experts Are Saying
- Yoo Jong-woo, head of research at Korea Investment & Securities: Assessed that below 6,000 represents an extreme undervaluation zone, and that bargain-hunting appeal exists following the sharp short-term decline.
- Lee Kyung-min, Daishin Securities analyst: Noted that the same piece of bad news wouldn’t have produced a decline this steep under normal circumstances, and that the real issue is the market’s underlying “resilience” itself rather than any single headline.
- Lee Kyung-soo, Hana Securities analyst: Explained that during the China Shock and Dubai Shock, foreign investors bought Korean stocks as part of portfolio rebalancing, which subsequently led to an index rebound, drawing a parallel to the current situation.
- Seo Sang-young, managing director at Mirae Asset Securities: Advised that while short-term bargain buying is possible, the market’s overall perspective on semiconductors needs to shift, and that whether rotation into other sectors spreads during the subsequent period of consolidation is what’s worth watching.
- Han Ji-young, Kiwoom Securities analyst: Argued that July’s decline is so severe it ranks first on record for any single month, reflecting a deeply oversold market, and that with memory peak-out fears, China’s capacity expansion race, and US rate-hike concerns still only potential risks rather than confirmed ones, the current decline looks excessive.
Taken together, July 2026 will be remembered as an unusual month in which the KOSPI recorded a steeper decline than either the global financial crisis or the IMF currency crisis, even though no comparable systemic crisis actually materialized. It’s the result of fears over Chinese competition, the AI valuation debate, leveraged-product-driven volatility, and extreme concentration in two stocks, all converging at once. With experts sharply divided between “extreme undervaluation” and “not the bottom yet,” a cautious approach appears warranted for the time being.
Sources
- News1 — “‘Worst Month in History’… July KOSPI Crashes Harder Than the Financial Crisis or IMF Crisis” (news1.kr)
- Herald Business — “‘Down More Than 30% in July Alone’… Why Invest in KOSPI at All? Every Crash Has a Reason” (biz.heraldcorp.com)
- Edaily — “Paler Than the IMF Crisis… The Reason Behind the Worst Panic Sell-Off” (edaily.co.kr)
- Seoul Economic Daily — “No Change in Fundamentals… Yet a Bigger July Decline (-28.9%) Than the Financial Crisis Sparks ‘Panic’” (sedaily.com)
- Newstomato — “Unprecedented Back-to-Back Circuit Breakers… KOSPI’s Worst Monthly Decline Ever” (newstomato.com)
- ZDNet Korea — “Steeper Than the IMF Crisis… July KOSPI Crashes ‘31.8%’” (zdnet.co.kr)
- Asia Economy — “KOSPI Falls Below 6,000 Again… Monthly Decline Ranks No. 1 on Record” (view.asiae.co.kr)
- Herald Business — “‘Fooled Again, False Hope’… KOSPI Slips Right Before 6,000… Closes Down Over 1%” (biz.heraldcorp.com)
- TV Seoul — “KOSPI Fails to Rebound… Closes at 5,593.56” (tvseoul.kr)
- Businesskorea — “[Market Close] KOSPI Ends Weak in Mixed Trading, Settling in Upper 5,500s” (businesskorea.co.kr)